{"note":"bim_versions 導入後の保存のみ記録 (それ以前は bim_canonical 上書きで履歴なし)","ok":true,"slug":"u-house-s7ftsuss","versions":[{"created_at":"2026-06-10T23:00:33Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote21259834 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"83dda05c4d1a2deca2afdf686c45b65e8d7df746460f08fa228053ba406e522f","version":9},{"created_at":"2026-06-10T21:27:58Z","element_count":89,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"91546458e10b78f5fda692b2f3dabbbfa06f94d5c173427d7c907be36adf000c","version":3}]}